ECU Problem??? - Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars

fasty · 12-16-2005, 20:42

When I was in the burnouts at the creek on wednesday I locked off the back brakes with some clamps I use at work (I am a mechanic) and away I went. Anyway all was well untill I done a high speed flick and the car was going backwards with the back wheels spinning at 100k's now as soon as the front wheels started to turn backwards the abs light came on and she shut down!!! It wasn't hot and restarted insantly as soon as all 4 wheels had stopped. It done this 3 times all up. Now is that common? Does the ecu get confused cause wheels are spinning in opposite directions or what??? Hmmmmm ponder that.

Jabba · 12-16-2005, 22:03

Your assumtion is correct.... ecu and abs go's coo coo when you do stuff like that....

RAVEN · 12-17-2005, 00:10

Yes That Is Correct.

fasty · 12-17-2005, 01:46

Hmmmm yeah I thought so. Thanks for that. Now I just have to overcome the problem so I can win the burnout event as I am about to start sponsoring it with the winner getting 2 new tyres any size up to 235/45/17!!!

jas24zzk · 12-18-2005, 05:34

The only way i know is to turn the ABS off!
pull the fuse.
but how will the ECU respond??? you can only try.. next step is to remove the abs.

Another option is to fit secondary sensors to the front, and a switch. the idea is to give the abs ECU the impression that it is getting info from 4 wheels from 2, rather than conflicting info...which is the dilemma you have.

without the full knowledge of how the system works inside, it MAY be possible to simply put in a switch that eliminates any signal from the wheel sensors to the ecu. I am not sure how it would respond to this, but a simple test would be to disconnect all four wheel sensors (easily done on a falcoon) and see what the result is.

jas

fasty · 12-19-2005, 00:22

Bloody good thinking!! I might try disconnecting the rear abs sensors.?! Maybe this will work. The rear brakes don't come on so the peddle doesn't pulse untill I go backwards then you feel the abs work and motor shuts down!!! Maybe it's the speed sensor too so it could be the front abs sensors like you say. Tell ya what I'll disconnect all 4 sensors and see this wednesday night hey. Come watch all. Let's see if I can get a stack AU XR8 into the 14's oh and it's a manual!!!

351cid · 12-19-2005, 03:01

one of my mates had a VP SS that he used in burnout comps.

he would just pull the ABS fuse.

xr8ute · 12-19-2005, 03:20

Pulling the fuse should work, as would pulling the plug off one of the ABS wheel sensors.

Its a nice little AU you've got there. I didn't see your burnout the other night, but the pics came out real good. Keep it up :)

When are you running it down the quarter? I should be at WSID again on the 28th...

fasty · 12-20-2005, 07:33

I will be there tonight and I run her down the 1/4 15.095 with .385 reaction in a manual. Will try for a 3 inchh exhaust today and bigger radiator. Watch tonight for a good show!!!! 2 brand new tyres are going to pop!!!!!!